Fast Pressure Controllers & Transducers

model

PC3–Absolute and Gauge Pressure Controllers with Remote Sensing

Fast-responding pressure control, anywhere you need it

Measure absolute or gauge pressure at any point in your system, and control flow at a different point to ensure your pressure stays on target. Alicat’s PC3 series physically isolates the pressure sensor from the valve and flow path so that you can control pressure exactly where you need it. This allows pressure control in areas where you cannot easily install a full pressure controller and reduces the effects of flow-induced pressure changes in high-flow applications. We’ll use your application parameters to customize your valve and PID tuning to ensure that your controller delivers fast and stable control.

  • Fast & Accurate. Very fast valves and PID control algorithms hit pressure setpoints in milliseconds with NIST-traceable accuracy.
  • Connected. Easy integration into your digital industrial network with Ethernet/IP, EtherCAT, DeviceNet, Profibus, Modbus (RTU and TCP/IP) or serial communications options.
  • Versatile. Plumb the pressure port downstream of the valve and flow body for pressure or vacuum control of the process that lies ahead of the valve. Plumb the pressure port upstream of the valve for backpressure control of the process that precedes the valve.

Available Ranges (see Part Numbers tab for stock ranges)

  • Absolute pressure ranges (referenced to vacuum)
    • PC3: max 0-3000 psia, min 0-10 torr
    • PC3S: max 0-3000 psia, min 0-30 psia
  • Gauge pressure ranges (referenced to atmosphere)
    • PC3: max 0*-3000 psig, min 0*-2 inH2Og
    • PC3S: max 0*-3000 psig, min 0*-5 psig
    • *Negative gauge pressure readings (to -15 psig) can also be included in gauge ranges.

Performance

  • Turndown ratio: 200:1
  • Standard accuracy calibration, NIST-traceable: +/- 0.25% of the full-scale range
  • Optional high-accuracy calibration, NIST-traceable: +/- 0.125% of the full-scale range
  • Repeatability: 0.08% of the full-scale range
  • Typical control response time constant: 50-100 ms (as low as 25 ms with PID tuning, dependent upon line sizing and the volumes and pressures involved)
  • No warm-up time required

Operating Conditions

  • Compatible gas media: all non-corrosive gases (PC3/PC3S). Liquids and corrosive gases require an S-series device (PC3S).
  • Operating temperature: -10°C to +60°C
  • Burst pressure: 3x the full-scale range

In the Box

Model Variations 

  • Backpressure configuration (with downstream valve, DS)
  • Aggressive gases (PC3S, see below)
  • Dual valve configuration for closed volumes (PCD3)

Also available:

  • Integrated pressure sensor (PC)

Valve Options 

Your pressure controller may be customized with one of the following valving options to ensure optimal performance under your expected process conditions.

  • PC3 – small proportional control valve for flow ranges of 20 slpm and below
  • PC3 with PCA designation – high-performance proportional control valve used for applications with higher pressures
  • PCP3 – small proportional control valve with the largest orifice (not available for corrosive configurations)
  • PCH3 – hammerhead configuration, which pairs two small valves working side-by-side as one valve
  • PCR3 – nearly frictionless large Rolamite proportional valve for flow rates of 50 slpm and above

Liquids and Corrosive Gases (PC3S series)

Instruments in the standard PC3 series are also available with an optional “S” configuration (PC3S) for use with liquids and corrosive gases. In this configuration, we upgrade the valve to 303 stainless steel, the sensor to 316L stainless steel and the elastomers to FFKM. Some corrosive gases require 316L stainless steel throughout the flow path, and in this case we can upgrade both the valve (type PCA) and flow body to 316L for full-scale flow ranges of 20 slpm or less.

Build Options

  • Communications protocols (analog, RS-232, RS-485, DeviceNet, EtherCAT, Ethernet/IP, Modbus RTU or TCP/IP, PROFIBUS)
  • Displays (monochrome or color, integrated or panel-mount)
  • Process connections (NPT, SAE, AN, BSPP/G, welded compression or VCR/VCO fittings)
  • Elastomers (Viton, FFKM, EPDM, Silicone)

Performance Options

Alicat’s PC3 series uses small proportional valves for control at lower flow rates and is suitable for use with non-corrosive gases.

Absolute Pressure:

PC3-10TORRA-D (IVC for vacuum)
PC3-100TORRA-D (IVC for vacuum)
PC3-15PSIA-D
PC3-30PSIA-D
PC3-100PSIA-D
PC3-500PSIA-D
PC3-1000PSIA-D
PC3-1500PSIA-D
PC3-2000PSIA-D
PC3-3000PSIA-D

Gauge Pressure:

PC3-2INH2OG-D
PC3AS-1PSIG-D
PC3-1PSIG-D
PC3-5PSIG-D
PC3-15PSIG-D
PC3-30PSIG-D
PC3-100PSIG-D
PC3-500PSIG-D
PC3-1000PSIG-D
PC3-1500PSIG-D
PC3-2000PSIG-D
PC3-3000PSIG-D

Alicat’s PCP3 series offers the largest orifice in a small valve format and is suitable for use with non-corrosive gases.

Absolute Pressure:

PCP3-15PSIA-D
PCP3-30PSIA-D
PCP3-100PSIA-D

Gauge Pressure:

PCP3-2INH2OG-D
PCP3AS-1PSIG-D
PCP3-1PSIG-D
PCP3-5PSIG-D
PCP3-15PSIG-D
PCP3-30PSIG-D
PCP3-100PSIG-D

Alicat’s PCH3 series pairs two small valves working side-by-side as one and is suitable for use with non-corrosive gases.

Absolute Pressure:

PCH3-15PSIA-D
PCH3-30PSIA-D
PCH3-100PSIA-D
PCH3-500PSIA-D

Gauge Pressure:

PCH3-2INH2OG-D
PCH3AS-1PSIG-D
PCH3-1PSIG-D
PCH3-5PSIG-D
PCH3-15PSIG-D
PCH3-30PSIG-D
PCH3-100PSIG-D
PCH3-500PSIG-D

Alicat’s PCR3 series uses nearly frictionless Rolamite valves and a variety of orifice patterns for control at high flow rates and is suitable for use with non-corrosive gases.

Absolute Pressure:

PCR3-10TORRA-D (IVC for vacuum)
PCR3-100TORRA-D (IVC for vacuum)
PCR3-15PSIA-D
PCR3-30PSIA-D
PCR3-100PSIA-D
PCR3-500PSIA-D

Gauge Pressure:

PCR3-2INH2OG-D
PCR3AS-1PSIG-D
PCR3-1PSIG-D
PCR3-5PSIG-D
PCR3-15PSIG-D
PCR3-30PSIG-D
PCR3-100PSIG-D
PCR3-500PSIG-D

Anti-corrosive series for aggressive gases and liquids.

Alicat’s PC3S series uses small proportional valves for control at lower flow rates and is suitable for use with liquids and corrosive gases.

Absolute Pressure:

PC3S-30PSIA-D
PC3S-100PSIA-D
PC3S-500PSIA-D
PC3S-1000PSIA-D
PC3S-1500PSIA-D
PC3S-2000PSIA-D
PC3S-3000PSIA-D

Gauge Pressure:

PC3S-5PSIG-D
PC3S-15PSIG-D
PC3S-30PSIG-D
PC3S-100PSIG-D
PC3S-500PSIG-D
PC3S-1000PSIG-D
PC3S-1500PSIG-D
PC3S-2000PSIG-D
PC3S-3000PSIG-D

Anti-corrosive series for aggressive gases and liquids.

Alicat’s PCH3S series is suitable for use with liquids and corrosive gases and pairs two valves working side-by-side as one to provide greater control at higher pressures.

Absolute Pressure:

PCH3S-30PSIA-D
PCH3S-100PSIA-D
PCH3S-500PSIA-D

Gauge Pressure:

PCH3S-5PSIG-D
PCH3S-15PSIG-D
PCH3S-30PSIG-D
PCH3S-100PSIG-D
PCH3S-500PSIG-D

Anti-corrosive series for aggressive gases and liquids.

Alicat’s PCR3S series is suitable for use with liquids and corrosive gases and uses nearly frictionless Rolamite valves and a variety of orifice patterns for control at high flow rates.

Absolute Pressure:

PCR3S-30PSIA-D
PCR3S-100PSIA-D
PCR3S-500PSIA-D

Gauge Pressure:

PCR3S-5PSIG-D
PCR3S-15PSIG-D
PCR3S-30PSIG-D
PCR3S-100PSIG-D
PCR3S-500PSIG-D

Faster Leak Testing

Establish stable pressure for the leak check by measuring pressure precisely at the device under test with Alicat’s PC3-series pressure controller with remote sense port. This method negates the pressure drop induced by the mass flow meter that is measuring the leak rate with 5-ms speed of response.

 

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